| 2689009 | Acidizing wells | |||
| 2681704 | Treating wells with a substrate | |||
| 2668098 | Gelling normally liquid hydrocarbons | |||
| 2596845 | Treatment of wells | |||
| 2596844 | Treatment of wells | |||
| 2596137 | Removing deposits from wells | |||
| 2379516 | Treatment of wells | |||
| 2285291 | Gravel packing of wells | |||
| 2050932 | Process for increasing the productivity of wells |